Module 5 - Thermal Physics

Question 1

Boyle’s Law

Answer 1

For a fixed mass of gas at a constant temperature, pressure is inversely proportional to the volume.

Question 2

A mole

Answer 2

the amount of any substance that contais the same number of elementary particles as 12g of Carbon-12.

Question 3

The number of particles in one mole of any substance

Answer 3

Avogadro constant (NA) (6.02x10^23)

Question 4

conditions assumed in Kinetic Theory of an Ideal Gas

Answer 4

1. Large number of molecules move with rapid, random motion.
2. Collisions are perfectly elastic and the time between collisions is negligible compared to the time between collisions.
3. The volume of atoms/particles/molecules is negligible compared to the volume of the gas.
4. There are no intermolecular forces except during collisions.

Question 5

Internal energy

Answer 5

the sum of the random distribution of kinetic and potential energies associated with the molecules of a system

Question 6

Thermal Equlibrium

Answer 6

If body 1 and body 2 are both in thermal equilibrium with body 3, then body 1 and body 2 must be in thermal equilibrium with each other

Question 7

Specific Heat Capacity

Answer 7

the amount of energy needed to raise the temperature of 1kg of substance by 1K or 1 degree Celsius

Question 8

Specific Latent Heat

Answer 8

the quantity of thermal energy required to change the state of 1kg of a substance

Question 9

The Pressure law

Answer 9

At constant volume, the pressure p of an ideal gas is directly proportional to its absolute temperature T

Question 10

Charles’ law

Answer 10

At constant pressure, the volume V of an ideal gas is directly proportional to its absolute temperature T